The Force Unleashed is a game released by Lucasarts in late 2008. Simultaneously, the game was released by several other developers for an absurd number of consoles and platforms ranging from the Wii, to iOS devices, to the fucking N-Gage. The Force Unleashed was developed with several new technologies—some even exclusively developed for this game—to create a much more realistic world in order to really let the player, ahem, unleash the force in ways it never had before. The game received generally positive reviews, but still received criticism in many different areas across the many, many different platforms.
The game's plot follows the story of Darth Vader's secret apprentice, known only as Starkiller, and his journey in the time period between Episode III and Episode IV of the main Star Wars movies. George Lucas himself was directly involved in the story and character development and as such The Force Unleashed has the dubious honour of being canon. While a great many Star Wars Expanded Universe material is considered canon, The Force Unleashed is meant to be the thread that connects the overall story of the two Star Wars trilogies by bridging the time skip between Episode III and Episode IV.